EP0015769A1 - Circular saws - Google Patents

Circular saws Download PDF

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Publication number
EP0015769A1
EP0015769A1 EP80300722A EP80300722A EP0015769A1 EP 0015769 A1 EP0015769 A1 EP 0015769A1 EP 80300722 A EP80300722 A EP 80300722A EP 80300722 A EP80300722 A EP 80300722A EP 0015769 A1 EP0015769 A1 EP 0015769A1
Authority
EP
European Patent Office
Prior art keywords
hub
disc
laminae
saw
space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80300722A
Other languages
German (de)
French (fr)
Inventor
Malcolm Wilfred Bailey
Theo Axel Notter
Derek Norman Wright
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Publication of EP0015769A1 publication Critical patent/EP0015769A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/005—Vibration-damping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00—Accessories specially designed for sawing machines or sawing devices
    • B23D59/02—Devices for lubricating or cooling circular saw blades
    • B23D59/025—Devices for lubricating or cooling circular saw blades the lubricating or cooling medium being applied through the mounting means of the tool, e.g. the tool spindle or hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/025—Details of saw blade body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
    • B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
    • B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
    • B23Q1/0036—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained one of those parts being a tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/10—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with cooling provisions, e.g. with radial slots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/12—Saw-blades or saw-discs specially adapted for working stone
    • B28D1/121—Circular saw blades

Definitions

  • THIS invention relates to circular saws of the kind comprising a hub, a disc radiating from the hub and cutting elements, such as diamond impregnated segments secured to the periphery of the disc.
  • Saws of the kind in question are characterised by noise at relatively high levels, -particularly within the audible frequency range.
  • C.P. Hallez describes a saw designed to reduce the noise during sawing operations.
  • the disc which he describes the disc is made of an assembly of two thin steel laminae of different thicknesses, in such a way that the vibration modes of the first lamina are dampened by the second one and vice versa.
  • a substance is sandwiched between the laminae, the modulus of elasticity of the substance is very different to that of steel and has a consistency very near to rubber. With this saw a very substantial noise reduction is achieved and mainly in the high frequencies.
  • An object of the invention is to provide a saw of the kind in question with which relatively to single core discs noise in the audible frequency range is considerably reduced and also facilitates the application of co61ant to the kerf being cut.
  • a circular saw according to the invention comprises a hub, a disc radiating from the.hub and cutting elements secured to the periphery of the disc, in which the disc is composed of two laminae which are spaced apart, secured to the hub and are bridged at their peripheries for carrying the cutting elements with regular gaps between the elements, in which the hub is provided with a liquid swivel, and in which the liquid swivel communicates with..the space between the laminae, so that in use the space is filled with coolant liquid.
  • the saw illustrated in the drawings has two discs 10 and 11 spaced apart at their peripheries by diamond impregnated cutting segments 12 and at their hub portions by an annular rib 13 around a shaft 23. The whole is sandwiched between two drive flanges 20 and 21.
  • the rib 13 is provided with a series of radial passages 14 which connect with axial passages 9 leading from an annular groove 15 in the drive flange 20. Facing the annular groove 15 is a water swivel 16 also formed with an annular groove 8.
  • a feed pipe 17 supplies the groove 8 with cutting fluid under pressure.
  • the illustrated disc in use thus consists of a laminate composed of two outer discs 10 and 11 and a fluid filled intermediate lamina 18.
  • the natural damping characteristics of such a disc are so altered that the audible noise in use is significantly reduced to the ear of an average observer.
  • the invention not only increases the damping characteristics of the disc, but also ensures that coolant is applied where it is most needed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Sawing (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

A circular diamond saw with diamond impregnated segments (12) on its periphery has a saw disc composed of two laminae (10,11) wich are spaced apart. Coolant liquid is fed to the space (18) between them from the centre and passes out through gaps between the segments (12).

Description

  • THIS invention relates to circular saws of the kind comprising a hub, a disc radiating from the hub and cutting elements, such as diamond impregnated segments secured to the periphery of the disc.
  • Saws of the kind in question are characterised by noise at relatively high levels, -particularly within the audible frequency range.
  • In Industrial Diamond Review of May, 1977, C.P. Hallez describes a saw designed to reduce the noise during sawing operations. In the saw which he describes the disc is made of an assembly of two thin steel laminae of different thicknesses, in such a way that the vibration modes of the first lamina are dampened by the second one and vice versa. To further dampen these vibrations, a substance is sandwiched between the laminae, the modulus of elasticity of the substance is very different to that of steel and has a consistency very near to rubber. With this saw a very substantial noise reduction is achieved and mainly in the high frequencies.
  • An object of the invention is to provide a saw of the kind in question with which relatively to single core discs noise in the audible frequency range is considerably reduced and also facilitates the application of co61ant to the kerf being cut.
  • A circular saw according to the invention comprises a hub, a disc radiating from the.hub and cutting elements secured to the periphery of the disc, in which the disc is composed of two laminae which are spaced apart, secured to the hub and are bridged at their peripheries for carrying the cutting elements with regular gaps between the elements, in which the hub is provided with a liquid swivel, and in which the liquid swivel communicates with..the space between the laminae, so that in use the space is filled with coolant liquid.
  • In the drawings :
    • figure is a section through a circular saw, and
    • Figure 2 is a face view of a portion of a saw blade.
  • The saw illustrated in the drawings has two discs 10 and 11 spaced apart at their peripheries by diamond impregnated cutting segments 12 and at their hub portions by an annular rib 13 around a shaft 23. The whole is sandwiched between two drive flanges 20 and 21. The rib 13 is provided with a series of radial passages 14 which connect with axial passages 9 leading from an annular groove 15 in the drive flange 20. Facing the annular groove 15 is a water swivel 16 also formed with an annular groove 8. A feed pipe 17 supplies the groove 8 with cutting fluid under pressure.
  • In use the cutting fluid flows from the pipe 17 to the space 18 between the discs 10 and 11 and out through the gulleys 19 (Figure 2) formed between segments 12.
  • The illustrated disc in use thus consists of a laminate composed of two outer discs 10 and 11 and a fluid filled intermediate lamina 18. The natural damping characteristics of such a disc are so altered that the audible noise in use is significantly reduced to the ear of an average observer.
  • As taught by Hallez the discs 10 and 11 could be made of different thicknesses, but it is believed that the improvements brought about by that would be minimal.
  • The invention not only increases the damping characteristics of the disc, but also ensures that coolant is applied where it is most needed.

Claims (2)

1. A circular saw comprising a hub, a disc radiating from the hub and cutting elements secured to the periphery of the disc, characterized in that the disc is composed of two laminae which are spaced apart, secured to the hub and are bridged at their peripheries for carrying the cutting elements with regular gaps between the elements, in which the hub is provided with a liquid swivel, and in which the liquid swivel communicates with the space between the laminae, so that in use that space is filled with coolant liquid.
2. The circular saw claimed in claim 1 characterized in that the cutting elements are diamond impregnated.
EP80300722A 1979-03-09 1980-03-07 Circular saws Withdrawn EP0015769A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7908373 1979-03-09
GB7908373 1979-03-09

Publications (1)

Publication Number Publication Date
EP0015769A1 true EP0015769A1 (en) 1980-09-17

Family

ID=10503750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80300722A Withdrawn EP0015769A1 (en) 1979-03-09 1980-03-07 Circular saws

Country Status (3)

Country Link
EP (1) EP0015769A1 (en)
JP (1) JPS55164478A (en)
ZA (1) ZA801174B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505615A1 (en) * 1991-03-23 1992-09-30 Ernst Winter & Sohn (Gmbh & Co.) Grinding wheel
WO1994002298A1 (en) * 1992-07-23 1994-02-03 Luciano De Noni A portable machine, with hydraulic transmission, for performing curved cuttings onto marble, granite, travertine and similar
GB2332162A (en) * 1997-12-12 1999-06-16 Simon Henry Jordan Grinding Discs
FR2793181A1 (en) * 1999-05-06 2000-11-10 Snecma Grinding wheel has inner annular cavity for lateral lubricant feed
EP1541279A1 (en) * 2002-09-05 2005-06-15 Kanefusa Kabushiki Kaisha Mist feeding mechanism of rotary tool
WO2018069400A1 (en) * 2016-10-13 2018-04-19 Lissmac Maschinenbau Gmbh Cut-off blade for material-removing machining
ES2834728A1 (en) * 2019-12-17 2021-06-18 Boada Germans Sa COOLING DEVICE FOR DISC CUTTERS (Machine-translation by Google Translate, not legally binding)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62123862U (en) * 1986-01-29 1987-08-06

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE34151C (en) * 1884-09-11 1886-01-02 A. L. TAVERDON in Paris, 36 Rue de l'arbalete COOLING DEVICE FOR DIAMOND-TIED CIRCULAR SAWS
DE834518C (en) * 1950-04-15 1952-03-20 Dieko Bruins Dipl Ing Grinding wheel with self-cooling
US3282263A (en) * 1963-07-29 1966-11-01 Christensen Diamond Prod Co Face discharge cutting blades

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE34151C (en) * 1884-09-11 1886-01-02 A. L. TAVERDON in Paris, 36 Rue de l'arbalete COOLING DEVICE FOR DIAMOND-TIED CIRCULAR SAWS
DE834518C (en) * 1950-04-15 1952-03-20 Dieko Bruins Dipl Ing Grinding wheel with self-cooling
US3282263A (en) * 1963-07-29 1966-11-01 Christensen Diamond Prod Co Face discharge cutting blades

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505615A1 (en) * 1991-03-23 1992-09-30 Ernst Winter & Sohn (Gmbh & Co.) Grinding wheel
WO1994002298A1 (en) * 1992-07-23 1994-02-03 Luciano De Noni A portable machine, with hydraulic transmission, for performing curved cuttings onto marble, granite, travertine and similar
GB2332162A (en) * 1997-12-12 1999-06-16 Simon Henry Jordan Grinding Discs
GB2332162B (en) * 1997-12-12 2002-09-18 Simon Henry Jordan Grinding disc
FR2793181A1 (en) * 1999-05-06 2000-11-10 Snecma Grinding wheel has inner annular cavity for lateral lubricant feed
EP1541279A1 (en) * 2002-09-05 2005-06-15 Kanefusa Kabushiki Kaisha Mist feeding mechanism of rotary tool
EP1541279A4 (en) * 2002-09-05 2007-03-21 Kanefusa Knife & Saw Mist feeding mechanism of rotary tool
WO2018069400A1 (en) * 2016-10-13 2018-04-19 Lissmac Maschinenbau Gmbh Cut-off blade for material-removing machining
ES2834728A1 (en) * 2019-12-17 2021-06-18 Boada Germans Sa COOLING DEVICE FOR DISC CUTTERS (Machine-translation by Google Translate, not legally binding)

Also Published As

Publication number Publication date
ZA801174B (en) 1981-02-25
JPS55164478A (en) 1980-12-22

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB IT SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19811118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WRIGHT, DEREK NORMAN

Inventor name: BAILEY, MALCOLM WILFRED

Inventor name: NOTTER, THEO AXEL